Get Up In , when seeing one of your friends creepin on a person you yell it as a code word as to not let the person whos getting creeped on know that you just told you friend to have sex with that person

at the bar or at school "dam josh is really creepin on that chick, G.U.I. bro!! "

The act of drinking a large amount of alcohol, and gobbling like a turkey.

Jim drank a whole bottle of Dack Janiels and gobbled loudly and waddled around like a turkey for well over ten minutes. Then soon after, a police officer tasered him, cuffed him, and took him into custody. He's going to do six months community service for his G.U.I. That poor bastard.

pronounced as Jooey: Sometimes you just cant decide wether you'd rather play some good old fashioned COD or get a nice blow from your girlfriend. Why not settle for both. This is where the GUI come in... Gaming under the influence. Now you can play with both sticks at the same time.

This the ultimate gaming experience. So get your girl, get your XBox and get under the influence.

Tommy was ignoring his girlfriend Laura, being he was in the middle of level 27 on Nazi Zombies. In order to resolve this conflict Laura proposed a GUI, which allowed him to keep his tip wet and destroy some zombies all at the same time.